Piano-locking device



March 2 1926.

1 1,575,532 I. E. BRETZFELDER Er AL PIANO LOCKING DEVICE Filed Jan. 16.1924 WITNESSES IN VENTOR$ Israel E. Brezgfelmar JZauriceKBreZg feZderJ05 eph 6/2 9! ATTORNEYS I toprovide a lockingattachment for the,

I yoia'k; 133. 7%} ns'siqivoli I "TIO IN'fOFIN EW IYORjKJ'Toalliwhomitimaizfcdnoerag s s v j 2; ;Be it knownthat-we,IsnA L'EQBnmzrnn' D1313, a1 citizen 7 of the, United .L States, and a residentofthecity of-New;York, borough of -Manhattaninthecountyiandafitate{of.New :York, MAURI E K; BB ZFE DER; e i zventhei-Uni ed.$ a and a es de t i e Q y 'oiff New; York, borough ofManhattan, in the 1 county ands-tats of NewYork, andJosErH resident ofthe-{city .of New; York,; borough of the Bronx, in the county ofBIOllXf-a'IiCl Stateaof NewfYor k, haveinvented a newand ImplQVBd iPiano Lo'ck-ing Device, of which the following-is scription. r

; This invention is; a devices and has, ;3 a'rti cular re viceforlockingipianos In-reproducing grand pianos, the roll or lTGOOIdptracker bar and the controls thelfefon terence to ,a d

? are installed in a sliding} drawer 1 arranged below thekeyboardjAt-the present time no means Eis nprovidedfor locking the drawer Vgeneral iuse maybe:used; to perorm atdual function. F

As a further 'f 'ingwhen the drawer isin open position.

Furthermore the invention GOmPrehends'f in-"af reproducinggrand piano "acommon means for, locking the top, --thefall and the W V 7 'keyboardhousing and into a keeper open;

'drawer -whichcontains the'controlsf; and

tracker bar in aclosed; position,- thereby eliminating the necessity ofemploying a v pluralit of lock mechanisms for the pur- I I As astillfurther object the invention aims drawer; of -areproducing grand'whichis comparatively simple in its construction, in expensive tomanufacture, and which is highly efficient/in its purpose;

u l, c eansed a t d?- in its closed position whereby the lock in objectflthe invention contemplatesi 1111 aqioekinggmeans 0i 'il ;hE,Cl12\ra(3ter I set forth;- a} .1 mechanism ilby virtue of whichthe-point of engavgel'ne'nt'fof thegdrawer lock-' drawer in'ordertoconceal the keeper open- :Q-PI No-LQGKING DEVICE;

'{ii piiea'tio mammar 16; 1924." serial nagesa's'z a' p anying drawings,representin one .emho dif- Inentofthe nvent veconcept,zj

In the drawings tional; viewfthnougli a {reproducing grand "isnnnrfE:BREZFELDEmM URI BItETZTIiElIiDER AND-JOSEPH simn yor-iiinw s-mo KRAKAUER330s., on NEW yoaxaiv. Y-.-, A conromu JJFigre leis a fragmentary"verticalisec-j constructed in accordance-with theinvention andillustrating the same in; its locked 'posi lti s A: I v p y A,

Fig, 2 is a detail perspective view "of the i ,-B-eferring to "thedrawings 1 characters of reference,10 designates. generally arepro-Jlockingattachment removed.

ducing grand which is; provided. with the. L

usual. hinged: top 511, frontboard 1-112 and 7 pivoted fall or keyboardtype of piano the'co n'trols, the tra'ckeriboard and jthellike arearranged awithin a d awer? 14:;rW1'1l QhQ iS;mOUIltdV-tbI SlldG beneaththe -v ;:s lower wall 15 of thekeyboard housing downwardly projectablelocking. bolt 16 is mounted ingthe frontboard and is movablerespectively' to lockcd and. unlocked position by means of akev'actuated loclr mechanism" l7; embedded inthe depending cleat 18 atthe, forward portionfo'f the top ll. The

' lock mechanism 17 in addition to projecting and retracting the lowerend of-the locking bolt 16 servesto connectrandlloclrthe top in itsclosed position. flhese locks are. ofgthe zspmm'on, ll k wn t p-x;.-anda 921 9 form apart of the present in directly vention;

vThe locking ,tion whenrthe fall 13 is closed andqlocked, consistsessentially'of a locking bolt 20 proattachment for simultane ouslylo'ckingthe drawer 14 in clos'ed rela I jectable belowlthe bottomwall.15 of the 5 ing '21 in the drawer 14 and a; pressure element 22which is operatively connected with thelocking bolt 20 and which isnormally 7 projected upwardly by a spring 23:,above' the upper edgeofthe vertical wall 24 of the keyboardhousing whereit is engaged by thefall; when the same is swung to its closed position. The spring 23serves in addition to projecting the'pressure-member distanceWhereby thesenie Willfiot bejex' posed to View when the drawer is open :gmd *fo'rthisfreasonrthe leakingbolt-20 is carried" or eonshitntes Lthedownturned end efthe arm 25 atfthe rear end of a shaft 26, the

forward end of, which ieirprovided with a corresponding arm 27. TheshafijgQG *is in the under side of the iower "Wail 15 0f head so;'threughf'whieh a st m. filgextends',

I saidstemtbeing secured to the p-ressnre mensrthe-1722.: The lewefien ddffthesern is formed I with StGp sY er ahutlnentsi32 and dispq'sedbelow-"andebevethe-head wg I the top 11 i and fall I13 v are arran ed inclosed position 7 ,ine ch'enismf conneeting the top With the fr'dnfibfbard-"zlfia nd with thelowe-r projited endi'efi the-decking iboar'df16 in rear oi' the gppef: edge I of the fell 113-, the ip-ressrrre elementj 22 will bemOved dewnwerdly thereby and simifltaneoiisiddwnwardswinging -In0ve kheiqeking eIje'm'enpfQf) in the keeper opening' 1 /21of the drawer wherebyhmanual gor 'ine l7ss.i..g ;wgci mz L in V r i '1];reproducing grand ipiano which Chemical epere'tieniqf the pianoispreluded;

includes ald'rawer disposed below thekeylhoa rd housing and 'eontaining"the .eontro-ls a.nd'traeker;bpard Of the player Ineehan-ism,- Iffiheeornbinaition With, the lockingniechanism' Whiehl0eks the top'endkey-beard c'overin ,c lesed pqsitionfof 1ockiI'1-g'meansffor said"mea'ns'xnermally"projecting the upper end i of the plunger into the pathof movement elbsedj en'ditibn by the locking mechanismQloekingiterminalengegeable ii n the fkeepe q g locki g e g me taef h eawe rd-Eyed mm the shaft for di s'engegingl th e.

drawer-comprisingwkeepel" Openingk infthe drawer; a: shaft 'lhaving',jzihgrilarl}? disposed front and rear arm'sfthe' letter; ha

ing a locking,iitemni nalbengageable fiche keeper opening ,nprm'dbwmverdtfswinging movement of saidyarmgai Plunger 50011- neetedWitlrthe free end of the ,front erm, Y

ofv the key-bo a-rd cver -.When moved, to closed position and effecting"the upward swingio f .the rear arm 'to 'disengagethe. 100k ingt'errnina1iro'm the keeper-opening where by'said keyboard, cover whenlocked coepei grtesfwith" said locking means to cans the sameto Ioe'kthe dr'awen l 2.7 The icombinatioriiivith z' ereproduqin grand pianowhich in llides' a drawer dif's osed belewfthe keygboardhousing and eofitainifigthe controls end-tracker gbar 0i pleyer meehen-isin;and-elbcking m'eehani 'fbribking the top and key-board. fiover; 0drawer-locking means; ineluding ;& opening fqnned in the drawer, aletchgfeom prising a sheftjhaving franfi and rev ng larly dispQsed;arms, the rear arm haying We p n d w d ing x g" e ment" ofirthe reararm, a plunger eo nnecfie t0 the free end of the front arm e xtending upa ygeab 'y'fli k -bo ee'veryvhen swung-to elo sed position for 4 t rinal the keeperpening," and means for; normally projecting the'phmgeriupe locking terminal" frgrni the keeper ism-E EfB TzFE-LDER.MAURICE K;

' JOSEPH

